Colossus of Production

Whenever you play a land, put a Work counter
on Colossus of Production. It gains the color of
the land you played until end of turn.
{x}, Remove X Work counters from Colossus of Production: Put X +1/+1 counters on this
creature.
At the beginning of your combat phase, Colossus
of Production gets +X/+X until end of turn,
where X is the number of colors it is.